#!./perl

BEGIN {
    unless (PerlIO::Layer->find( 'perlio')) {
	print $^STDOUT, "1..0 # Skip: not perlio\n";
	exit 0;
    }
    require Config;
}

use warnings;

my $tmp = "via$^PID";

use Test::More tests => 18;
use bytes;

my $fh;
my $a = join("", map { chr }, 0..255) x 10;
my $b;

BEGIN { use_ok('PerlIO::via::QuotedPrint'); }

ok( !open($fh,"<via(PerlIO::via::QuotedPrint)", $tmp), 'open QuotedPrint for input fails');
ok(  open($fh,">via(PerlIO::via::QuotedPrint)", $tmp), 'open QuotedPrint for output');
ok( (print $fh, $a), "print to output file");
ok( close($fh), 'close output file');

ok( open($fh,"<via(PerlIO::via::QuotedPrint)", $tmp), 'open QuotedPrint for input');
do { local $^INPUT_RECORD_SEPARATOR = undef; $b = ~< $fh };
ok( close($fh), "close input file");

is($a, $b, 'compare original data with filtered version');


do {
    my $warnings = '';
    local $^WARN_HOOK = sub { $warnings = @_[0]->{?description} };

    use warnings 'layer';

    # Find fd number we should be using
    my $fd = open($fh, ">","$tmp") && fileno($fh);
    print $fh, "Hello\n";
    close($fh);

    ok( ! open($fh,">via(Unknown::Module)", $tmp), 'open via Unknown::Module will fail');
    like( $warnings, qr/^Cannot find package 'Unknown::Module'/,  'warn about unknown package' );

    # Now open normally again to see if we get right fileno
    my $fd2 = open($fh, "<","$tmp") && fileno($fh);
    is($fd2,$fd,"Wrong fd number after failed open");

    my $data = ~< $fh;

    is($data,"Hello\n","File clobbered by failed open");

    close($fh);

do {
package Incomplete::Module; 
};

    $warnings = '';
    no warnings 'layer';
    ok( ! open($fh,">via(Incomplete::Module)", $tmp), 'open via Incomplete::Module will fail');
    is( $warnings, "",  "don't warn about unknown package" );

    $warnings = '';
    no warnings 'layer';
    ok( ! open($fh,">via(Unknown::Module)", $tmp), 'open via Unknown::Module will fail');
    is( $warnings, "",  "don't warn about unknown package" );
};

my $obj = '';
sub Foo::PUSHED			{ $obj = shift; -1; }
sub PerlIO::via::Bar::PUSHED	{ $obj = shift; -1; }
open $fh, '<:via(Foo)', "foo";
is( $obj, 'Foo', 'search for package Foo' );
open $fh, '<:via(Bar)', "bar";
is( $obj, 'PerlIO::via::Bar', 'search for package PerlIO::via::Bar' );

END {
    1 while unlink $tmp;
}